mirror of
https://github.com/gonum/gonum.git
synced 2025-10-06 07:37:03 +08:00
36 lines
707 B
Go
36 lines
707 B
Go
// Copyright ©2015 The Gonum Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build !amd64 noasm appengine safe
|
|
|
|
package f64
|
|
|
|
// DotUnitary is
|
|
// for i, v := range x {
|
|
// sum += y[i] * v
|
|
// }
|
|
// return sum
|
|
func DotUnitary(x, y []float64) (sum float64) {
|
|
for i, v := range x {
|
|
sum += y[i] * v
|
|
}
|
|
return sum
|
|
}
|
|
|
|
// DotInc is
|
|
// for i := 0; i < int(n); i++ {
|
|
// sum += y[iy] * x[ix]
|
|
// ix += incX
|
|
// iy += incY
|
|
// }
|
|
// return sum
|
|
func DotInc(x, y []float64, n, incX, incY, ix, iy uintptr) (sum float64) {
|
|
for i := 0; i < int(n); i++ {
|
|
sum += y[iy] * x[ix]
|
|
ix += incX
|
|
iy += incY
|
|
}
|
|
return sum
|
|
}
|